<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0034-8376</journal-id>
<journal-title><![CDATA[Revista de investigación clínica]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. invest. clín.]]></abbrev-journal-title>
<issn>0034-8376</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0034-83762022000200071</article-id>
<article-id pub-id-type="doi">10.24875/ric.21000542</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Result Turnaround Time of RT-PCR for SARS-CoV-2 is the Main Cause of COVID-19 Diagnostic Delay: A Country-Wide Observational Study of Mexico and Colombia]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Núñez]]></surname>
<given-names><![CDATA[Isaac]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Belaunzarán-Zamudio]]></surname>
<given-names><![CDATA[Pablo F.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Caro-Vega]]></surname>
<given-names><![CDATA[Yanink]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán Department of Medical Education ]]></institution>
<addr-line><![CDATA[Mexico City ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán Department of Infectious Diseases ]]></institution>
<addr-line><![CDATA[Mexico City ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,National Institutes of Health Department of National Institute of Allergy and Infectious Diseases ]]></institution>
<addr-line><![CDATA[Bethesda ]]></addr-line>
<country>USA</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2022</year>
</pub-date>
<volume>74</volume>
<numero>2</numero>
<fpage>71</fpage>
<lpage>80</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0034-83762022000200071&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0034-83762022000200071&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0034-83762022000200071&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Background: Delay in COVID-19 diagnosis due to late real-time reverse transcription-polymerase chain reaction reporting has been described to be an important cause of suboptimal COVID-19 surveillance and outbreak containment.  Objective: The objective of the study was to determine the duration of diagnostic delay due to test turnaround time and its association with marginalization status.  Methods: In this observational study using national open data of Mexico and Colombia, we quantified the delay in COVID-19 diagnosis that occurred in both countries. We considered two periods that contributed to the delay in diagnosis: the time from symptom onset until testing (delay-one) and test turnaround time (delay-two). Marginalization status was determined according to country-specific scores.  Results: Among 3,696,773 patients from Mexico and Colombia, delay-two was generally longer than delay-one. Median delay-one was 3 days and delay-two 7 days in Colombia, while in Mexico, they were 3 days and 4 days, respectively. In Colombia, worse marginalization status prolonged delay-two. In Mexico, a lower number and percentage of rapid tests were performed in areas with worse marginalization.  Conclusion: Diagnostic delay was mostly due to test turnaround time. Marginalization status was an important barrier to diagnostic test access.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[SARS-CoV-2]]></kwd>
<kwd lng="en"><![CDATA[COVID-19]]></kwd>
<kwd lng="en"><![CDATA[Real-time polymerase chain reaction]]></kwd>
<kwd lng="en"><![CDATA[Mexico]]></kwd>
<kwd lng="en"><![CDATA[Colombia]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>1</label><nlm-citation citation-type="book">
<collab>World Health Organization</collab>
<source><![CDATA[Operational Considerations for COVID-19 Surveillance Using GISRS]]></source>
<year>2020</year>
<publisher-loc><![CDATA[Geneva ]]></publisher-loc>
<publisher-name><![CDATA[World Health Organization]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Corman]]></surname>
<given-names><![CDATA[VM]]></given-names>
</name>
<name>
<surname><![CDATA[Landt]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Kaiser]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Molenkamp]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Meijer]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Chu]]></surname>
<given-names><![CDATA[DK]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Detection of 2019 novel coronavirus (2019-nCoV) by real-time RT-PCR]]></article-title>
<source><![CDATA[Eurosurveillance]]></source>
<year>2020</year>
<volume>25</volume>
<page-range>2000045</page-range></nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mina]]></surname>
<given-names><![CDATA[MJ]]></given-names>
</name>
<name>
<surname><![CDATA[Andersen]]></surname>
<given-names><![CDATA[KG]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[COVID-19 testing: one size does not fit all]]></article-title>
<source><![CDATA[Science]]></source>
<year>2021</year>
<volume>371</volume>
<page-range>126-7</page-range></nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Núñez]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Belaunzarán-Zamudio]]></surname>
<given-names><![CDATA[PF]]></given-names>
</name>
<name>
<surname><![CDATA[Caro-Vega]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Impact of RT-PCR test false-negative results for SARS-CoV-2 surveillance in Mexico]]></article-title>
<source><![CDATA[Rev Invest Clín]]></source>
<year>2021</year>
<volume>73</volume>
<page-range>5962</page-range></nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kucirka]]></surname>
<given-names><![CDATA[LM]]></given-names>
</name>
<name>
<surname><![CDATA[Lauer]]></surname>
<given-names><![CDATA[SA]]></given-names>
</name>
<name>
<surname><![CDATA[Laeyendecker]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Boon]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Lessler]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Variation in false-negative rate of reverse transcriptase polymerase chain reaction-based SARS-CoV-2 tests by time since exposure]]></article-title>
<source><![CDATA[Ann Intern Med]]></source>
<year>2020</year>
<volume>173</volume>
<page-range>262-7</page-range></nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kevadiya]]></surname>
<given-names><![CDATA[BD]]></given-names>
</name>
<name>
<surname><![CDATA[Machhi]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Herskovitz]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Oleynikov]]></surname>
<given-names><![CDATA[MD]]></given-names>
</name>
<name>
<surname><![CDATA[Blomberg]]></surname>
<given-names><![CDATA[WR]]></given-names>
</name>
<name>
<surname><![CDATA[Bajwa]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Diagnostics for SARS-CoV-2 infections]]></article-title>
<source><![CDATA[Nat Mater]]></source>
<year>2021</year>
<volume>20</volume>
<page-range>593-605</page-range></nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="book">
<collab>World Health Organization</collab>
<source><![CDATA[Maintaining Surveillance of Influenza and Monitoring SARS-CoV-2 Adapting Global Influenza Surveillance and Response System (GISRS) and Sentinel Systems during the COVID-19 Pandemic: interim Guidance]]></source>
<year>2020</year>
<publisher-loc><![CDATA[Geneva ]]></publisher-loc>
<publisher-name><![CDATA[World Health Organization]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B8">
<label>8</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mena]]></surname>
<given-names><![CDATA[GE]]></given-names>
</name>
<name>
<surname><![CDATA[Martínez]]></surname>
<given-names><![CDATA[PP]]></given-names>
</name>
<name>
<surname><![CDATA[Mahmud]]></surname>
<given-names><![CDATA[AS]]></given-names>
</name>
<name>
<surname><![CDATA[Marquet]]></surname>
<given-names><![CDATA[PA]]></given-names>
</name>
<name>
<surname><![CDATA[Buckee]]></surname>
<given-names><![CDATA[CO]]></given-names>
</name>
<name>
<surname><![CDATA[Santillana]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Socioeconomic status determines COVID-19 incidence and related mortality in Santiago, Chile]]></article-title>
<source><![CDATA[Science]]></source>
<year>2021</year>
<volume>372</volume>
</nlm-citation>
</ref>
<ref id="B9">
<label>9</label><nlm-citation citation-type="">
<collab>Datos Abiertos Bases Históricas COVID-19</collab>
<source><![CDATA[Dirección General de Epidemiología, Gobierno de México]]></source>
<year></year>
</nlm-citation>
</ref>
<ref id="B10">
<label>10</label><nlm-citation citation-type="">
<collab>Casos Positivos de COVID-19 en Colombia</collab>
<source><![CDATA[Instituto Nacional de Salud. Gobierno de Colombia]]></source>
<year></year>
</nlm-citation>
</ref>
<ref id="B11">
<label>11</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cevik]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Tate]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Lloyd]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Maraolo]]></surname>
<given-names><![CDATA[AE]]></given-names>
</name>
<name>
<surname><![CDATA[Schafers]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Ho]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[SARS-CoV-2, SARS-CoV, and MERS-CoV viral load dynamics, duration of viral shedding, and infectiousness: a systematic review and meta-analysis]]></article-title>
<source><![CDATA[Lancet Microbe]]></source>
<year>2021</year>
<volume>2</volume>
<page-range>22</page-range></nlm-citation>
</ref>
<ref id="B12">
<label>12</label><nlm-citation citation-type="">
<collab>Pobreza y Desigualdad en Colombia</collab>
<source><![CDATA[Departamento Administrativo Nacional de Estadística, Gobierno de Colombia]]></source>
<year></year>
</nlm-citation>
</ref>
<ref id="B13">
<label>13</label><nlm-citation citation-type="book">
<source><![CDATA[Colombia. Índice de Pobreza Multidimensional]]></source>
<year>2019</year>
<publisher-name><![CDATA[Archivo Nacional de Datos]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B14">
<label>14</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Alkire]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Santos]]></surname>
<given-names><![CDATA[ME]]></given-names>
</name>
</person-group>
<source><![CDATA[Acute Multidimensional Poverty: a New Index for Developing Countries]]></source>
<year>2010</year>
<publisher-loc><![CDATA[University of Oxford ]]></publisher-loc>
<publisher-name><![CDATA[OPHI Working Papers 38]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B15">
<label>15</label><nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Índice Absoluto de Marginación 2000-2010]]></article-title>
<source><![CDATA[Consejo Nacional de Población, Gobierno de México]]></source>
<year>2013</year>
</nlm-citation>
</ref>
<ref id="B16">
<label>16</label><nlm-citation citation-type="book">
<collab>Censo de Población y Vivienda 2020</collab>
<source><![CDATA[Instituto Nacional de Estadística y Geografía]]></source>
<year>2021</year>
<publisher-name><![CDATA[Gobierno de México]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B17">
<label>17</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Textor]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Hardt]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Knüppel]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[DAGitty: a graphical tool for analyzing causal diagrams]]></article-title>
<source><![CDATA[Epidemiology]]></source>
<year>2011</year>
<volume>22</volume>
<page-range>745</page-range></nlm-citation>
</ref>
<ref id="B18">
<label>18</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hernan]]></surname>
<given-names><![CDATA[MA]]></given-names>
</name>
<name>
<surname><![CDATA[Hernández-Díaz]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Werler]]></surname>
<given-names><![CDATA[MM]]></given-names>
</name>
<name>
<surname><![CDATA[Mitchell]]></surname>
<given-names><![CDATA[AA]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Causal knowledge as a prerequisite for confounding evaluation: an application to birth defects epidemiology]]></article-title>
<source><![CDATA[Am J Epidemiol]]></source>
<year>2002</year>
<volume>155</volume>
<page-range>176-84</page-range></nlm-citation>
</ref>
<ref id="B19">
<label>19</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Czeisler]]></surname>
<given-names><![CDATA[MÉ]]></given-names>
</name>
<name>
<surname><![CDATA[Marynak]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Clarke]]></surname>
<given-names><![CDATA[KE]]></given-names>
</name>
<name>
<surname><![CDATA[Salah]]></surname>
<given-names><![CDATA[Z]]></given-names>
</name>
<name>
<surname><![CDATA[Shakya]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Thierry]]></surname>
<given-names><![CDATA[JM]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Delay or avoidance of medical care because of COVID-19-related concerns-United States, June 2020]]></article-title>
<source><![CDATA[MMWR Morb Mortal Wkly Rep]]></source>
<year>2020</year>
<volume>69</volume>
<page-range>1250-7</page-range></nlm-citation>
</ref>
<ref id="B20">
<label>20</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Giri]]></surname>
<given-names><![CDATA[AK]]></given-names>
</name>
<name>
<surname><![CDATA[Rana]]></surname>
<given-names><![CDATA[DR]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Charting the challenges behind the testing of COVID-19 in developing countries: Nepal as a case study]]></article-title>
<source><![CDATA[Biosaf Health]]></source>
<year>2020</year>
<volume>2</volume>
<page-range>53-6</page-range></nlm-citation>
</ref>
<ref id="B21">
<label>21</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[El-Gilany]]></surname>
<given-names><![CDATA[AH]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[COVID-19 caseness: an epidemiologic perspective]]></article-title>
<source><![CDATA[J Infect Public Health]]></source>
<year>2021</year>
<volume>14</volume>
<page-range>61-5</page-range></nlm-citation>
</ref>
<ref id="B22">
<label>22</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Núñez]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Caro-Vega]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Belaunzarán-Zamudio]]></surname>
<given-names><![CDATA[PF]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Importance of adequate COVID-19 case definitions in the SARS-CoV-2 pandemic]]></article-title>
<source><![CDATA[medRxiv]]></source>
<year>2021</year>
<volume>2021</volume>
<page-range>21258845</page-range></nlm-citation>
</ref>
<ref id="B23">
<label>23</label><nlm-citation citation-type="book">
<collab>Listado de Pruebas de Antígeno</collab>
<source><![CDATA[Útiles Para SARS CoV 2 en Puntos de Atención]]></source>
<year>2021</year>
<publisher-name><![CDATA[Gobierno de México]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B24">
<label>24</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Larremore]]></surname>
<given-names><![CDATA[DB]]></given-names>
</name>
<name>
<surname><![CDATA[Wilder]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Lester]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Shehata]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Burke]]></surname>
<given-names><![CDATA[JM]]></given-names>
</name>
<name>
<surname><![CDATA[Hay]]></surname>
<given-names><![CDATA[JA]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Test sensitivity is secondary to frequency and turnaround time for COVID-19 screening]]></article-title>
<source><![CDATA[Sci Adv]]></source>
<year>2021</year>
<volume>7</volume>
</nlm-citation>
</ref>
<ref id="B25">
<label>25</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Monterrubio-Flores]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Ramírez-Villalobos]]></surname>
<given-names><![CDATA[MD]]></given-names>
</name>
<name>
<surname><![CDATA[Espinosa-Montero]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Hernández]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Barquera]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Villalobos-Daniel]]></surname>
<given-names><![CDATA[VE]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Characterizing a two-pronged epidemic in Mexico of non-communicable diseases and SARS-Cov-2: factors associated with increased case-fatality rates]]></article-title>
<source><![CDATA[Int J Epidemiol]]></source>
<year>2021</year>
<volume>50</volume>
<page-range>430-45</page-range></nlm-citation>
</ref>
<ref id="B26">
<label>26</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Nájera]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Ortega-Avila]]></surname>
<given-names><![CDATA[AG]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Health and institutional risk factors of COVID-19 mortality in Mexico, 2020]]></article-title>
<source><![CDATA[Am J Prev Med]]></source>
<year>2021</year>
<volume>60</volume>
<page-range>471-7</page-range></nlm-citation>
</ref>
<ref id="B27">
<label>27</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Núñez]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Soto-Mota]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Hospital saturation and risk of death without receiving mechanical ventilation in hospitalized COVID-19 patients: a city-wide analysis]]></article-title>
<source><![CDATA[medRxiv]]></source>
<year>2021</year>
<volume>2021</volume>
<page-range>21258844</page-range></nlm-citation>
</ref>
<ref id="B28">
<label>28</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Boum]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Fai]]></surname>
<given-names><![CDATA[KN]]></given-names>
</name>
<name>
<surname><![CDATA[Nikolay]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Mboringong]]></surname>
<given-names><![CDATA[AB]]></given-names>
</name>
<name>
<surname><![CDATA[Bebell]]></surname>
<given-names><![CDATA[LM]]></given-names>
</name>
<name>
<surname><![CDATA[Ndifon]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Performance and operational feasibility of antigen and antibody rapid diagnostic tests for COVID-19 in symptomatic and asymptomatic patients in Cameroon: a clinical, prospective, diagnostic accuracy study]]></article-title>
<source><![CDATA[Lancet Infect Dis]]></source>
<year>2021</year>
<volume>21</volume>
<page-range>1089-96</page-range></nlm-citation>
</ref>
<ref id="B29">
<label>29</label><nlm-citation citation-type="">
<collab>COVID-19 Rapid Antigen Self-tests that are Approved in Australia</collab>
<source><![CDATA[Australian Government Department of Health]]></source>
<year>2021</year>
</nlm-citation>
</ref>
<ref id="B30">
<label>30</label><nlm-citation citation-type="">
<collab>Coronavirus Self-tests</collab>
<source><![CDATA[Government of the Netherlands]]></source>
<year>2021</year>
</nlm-citation>
</ref>
<ref id="B31">
<label>31</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Accorsi]]></surname>
<given-names><![CDATA[EK]]></given-names>
</name>
<name>
<surname><![CDATA[Qiu]]></surname>
<given-names><![CDATA[X]]></given-names>
</name>
<name>
<surname><![CDATA[Rumpler]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Kennedy-Shaffer]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Kahn]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Joshi]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[How to detect and reduce potential sources of biases in studies of SARS-CoV-2 and COVID-19]]></article-title>
<source><![CDATA[Eur J Epidemiol]]></source>
<year>2021</year>
<volume>36</volume>
<page-range>179-96</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
